Which of the following is not usually seen when a cell loses telomerase activity?
A) Telomeres shorten slightly with each cell division.
B) After 30-50 divisions,cells show signs of senescence and then die.
C) Chromosomes gradually become shorter.
D) Many normal somatic cells gain the ability to divide indefinitely.
E) None of these.

Question

Quizplus · Accepted Answer

When a cell loses telomerase activity, it cannot maintain the length of its telomeres. As a result, telomeres shorten slightly with each cell division and chromosomes gradually become shorter. This can lead to cells showing signs of senescence and eventually dying after 30-50 divisions. However, normal somatic cells do not gain the ability to divide indefinitely when telomerase activity is lost. This ability is seen in cancer cells, which often have reactivated telomerase activity. Therefore, option D is the correct choice as it is not usually seen when a cell loses telomerase activity.

Which of the Following Is Not Usually Seen When a Cell